N06686 isA single-phase austenitic ni-cr-mo-w alloy with excellent corrosion resistance in a range of harsh environments: resistance to reducing conditions. Antioxidant media that helps to resist localized corrosion, such as pitting.
N06686 Chemical Composition;
ni( ) margin.
co( ) is not available.
mo(％)15.0～17.0
w(％)3.00～4.40
ti(％)0.02～0.25
fe(％)2.00
:p≤0.040,s≤0.020
c(％)0.010
si(％)0.08
mn(％)0.75
cr(％)19.0～23.0
n06686Corrosion-resistant alloy application fields:
1.Thermowells in aggressive atmospheres.
2.Vinyl chloride monomer production: resistant to chlorine, hydrogen chloride, oxidation and carbonization corrosion.
3.Oxidation of uranium to hexafluoride: resistant to hydrogen fluoride corrosion.
4.The production and use of corrosive alkali metals, especially in environments where sulfides are used.
5.Titanium dioxide is produced by chlorine gas.
6.Production of organic or inorganic chlorides and fluorides: resistant to chlorine and fluoride.
7.Nuclear reactors.
8.Curved neck flasks and components in heat treatment furnaces, especially in carbonization and nitriding atmospheres.
9.Catalytic regenerators in petrochemical production are recommended for longer use in applications above 700 °C for longer use.
1. Material properties
The chemical composition of N06686 is mainly nickel, chromium, molybdenum, tungsten, etc., which has high thermal stability and mechanical strength, and its high-temperature oxidation resistance is also very good. Other key features include:
1.High temperature strength: N06686 has extremely high high temperature strength and can still maintain good mechanical properties in high temperature environment.
2.Oxidation resistance: N06686 has excellent oxidation resistance and can be used for a long time in high-temperature, harsh environments without damage.
3.Corrosion resistance: N06686 has very good corrosion resistance and excellent performance in hot corrosion and corrosion fatigue.
4.Processability: N06686 has good processability, and can be processed by two methods: cold and hot processing.
2. Welding
N06686 has good welding performance and can be welded by TIG, MIG, resistance welding and other methods. But there are a few things you need to pay attention to when welding:
1.Choose the right welding materials and welding processes to avoid defects such as cracks and porosity.
2.Choose the right preheating and post-treatment conditions to improve the performance of the welded joint.
Alloy 686 Characteristics and Applications:
Excellent corrosion resistance, can be used as a universal weld filler metal.
Alloy 686 was specifically developed to be able to find an alloy that exhibits outstanding corrosion resistance in many harsh corrosive environments.
alloy 686The alloy has excellent resistance to general corrosion, stress corrosion cracking, pitting and crevice corrosion. During the welding process, its intergranular precipitation maintains the corrosion resistance of the welded joint in the heat-affected zone. It is resistant not only to reducing acids, but also to oxidizing acids and mixed acid solutions. It is particularly suitable for processing mixed acids containing high concentrations of halides. Good resistance to mixed acid media with a pH of 1 and below and chloride content of more than 100,000 ppm.
alloy 686Alloys are used in the harshest working conditions, mainly for chemical treatment, pollution prevention, pulp and paper, industrial waste and domestic waste treatment. Chemical processing includes heat exchangers, reactors, evaporators, and transmission pipelines. In terms of air pollution prevention and control, there are chimney linings, pipes, furnace doors, scrubbers, flue gas reheaters, propellers, and covers.
Alloy 686 is available in the following formats:
Pipes, sheets, plates, strips, round bars, hexagonal bars, wires, forgings.